I dont feel its normal at all , I never lifted my head on either car or any of my customers cars
Excessive Cyl psi can come from other things as well like the tune , are you using your stock knock sensor ?
A bigger stud isnt going to hold the head down more unless your stretching the studs which I doubt your doing , measure your studs and see if your stretching them it would be measureable
I have seen a few of the 1000HP Focus engines and they didnt have larger studs either
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